Komfovent VERSO Pro S Manual

VERSO PRO
S / R / P / RHP / PCF
INSTALLATION AND
MAINTENANCE
SERVICE MANUAL
EN

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 3
Content
1. VERSO AIR HANDLING UNITS........................................................................................................................................5
1.1. VERSO Air Handling Units marking..........................................................................................................................6
1.2. VERSO-S – Air Supply Units........................................................................................................................................7
1.3. VERSO-P/PCF – Air Handling Units Equipped with Plate Heat Exchanger...............................................7
1.4. VERSO-R/RHP – Air Handling Units Equipped with Rotary Heat Exchanger ..........................................8
1.5. Brief Description of the Unit ......................................................................................................................................8
1.6. VERSO Air Handling Units Composing Options .................................................................................................9
2. VERSO AIR HANDLING UNITS CONSTRUCTION................................................................................................10
2.1. Fans....................................................................................................................................................................................10
2.2. Plate Heat Exchanger in VERSO-P/PCF Air Handling Units..........................................................................11
2.3. Rotary Heat Exchanger in VERSO-R/RHP Air Handling Units .....................................................................13
2.4. Verso RHP units.............................................................................................................................................................14
2.5. Air Dampers ...................................................................................................................................................................17
2.6. Air Filters and Filter Change Procedure ..............................................................................................................18
2.7. Water Air Heaters, Air Coolers, Direct Evaporation Air Coolers..................................................................18
2.8. Electric Air Heaters in VERSO-S Series Air Handling Units .......................................................................... 22
2.9. Electric Air Heaters in VERSO-P/PCF and VERSO-R/RHP Series Air Handling Units........................... 22
2.10. VERSO Series Air Handling Units Designed for the Outdoor Use........................................................... 23
3. VERSO AIR HANDLING UNITS TRANSPORTATION.......................................................................................... 25
4. VERSO AIR HANDLING UNITS INSTALLATION...................................................................................................27
4.1. VERSO Air Handling Units Maintenance Space.................................................................................................27
4.2. Setting and Installing VERSO Air Handling Units ........................................................................................... 28
4.3. Connection to Air Ducts........................................................................................................................................... 29
4.4. VERSO Air Handling Units Sloping Drain Tray.................................................................................................. 30
4.5. Check-up before turning on VERSO Air Handling Unit .................................................................................31
5. ELECTRICAL INSTALLATION MANUAL....................................................................................................................32
5.1. Air Handling Units Sections Connection.............................................................................................................32
5.2. Electric Power Supply Connection........................................................................................................................32
5.3. External Elements Connection...............................................................................................................................32
5.4. Temperature Sensors Installation......................................................................................................................... 34
5.5. Requirements for the installation of the control panel ............................................................................... 34
5.6. Control panel connection ....................................................................................................................................... 34
6. OPERATION MANUAL ......................................................................................................................................................35
6.1. Unit Control ....................................................................................................................................................................35
6.2. Control panel indication...........................................................................................................................................35
6.3. Parameters overview................................................................................................................................................. 36
6.4. Operation modes selection.................................................................................................................................... 36
6.5. Menu.................................................................................................................................................................................37
6.5.1. Overview .............................................................................................................................................................37
6.5.1.1. Alarms....................................................................................................................................................37
6.5.1.2. Operation counters..........................................................................................................................37
6.5.1.3. Eciency status.................................................................................................................................37
6.5.1.4. Detailed information.......................................................................................................................37
6.5.1.5. Filter status......................................................................................................................................... 38
6.5.1.6. Inspection lightning....................................................................................................................... 38
6.5.2. Functions........................................................................................................................................................... 38
6.5.2.1. Air quality control............................................................................................................................ 38
6.5.2.2. Operation on demand ..................................................................................................................39
6.5.2.3. Outdoor compensated ventilation ..........................................................................................39

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
4
EN
This symbol indicates that this product is not to be disposed of with your household waste, according
to the WEEE Directive (2002/96/EC) and your national law. This product should be handed over to a
designated collection point, or to an authorised collection site for recycling waste electrical and
electronic equipment (EEE). Improper handling of this type of waste could have a possible nega-
tive impact on the environment and human health due to potentially hazardous substances that
are generally associated with EEE. At the same time, your cooperation in the correct disposal
of this product will contribute to the eective usage of natural resources. For more information
about where you can drop o your waste equipment for recycling, please contact your local city
oce, waste authority, approved WEEE scheme or your household waste disposal service.
6.5.2.4. Summer night cooling ..................................................................................................................39
6.5.2.5. Minimum temperature control ................................................................................................ 40
6.5.2.6. Override function .......................................................................................................................... 40
6.5.2.7. Humidity control ............................................................................................................................ 40
6.5.2.8. Recirculation control ......................................................................................................................41
6.5.3. Scheduling .........................................................................................................................................................42
6.5.3.1. Operation program..........................................................................................................................42
6.5.3.2. Holidays...............................................................................................................................................42
6.5.3.3. Recirculation schedule...................................................................................................................42
6.5.4. Settings................................................................................................................................................................43
6.5.4.1. Air handling unit settings .............................................................................................................43
6.5.4.2. Personalization ................................................................................................................................ 44
6.6. Control of air handling units through a web browser.................................................................................. 45
6.7. Additional control options ...................................................................................................................................... 45
6.7.1. Combined water coil control....................................................................................................................... 45
6.7.2. Multi-level control of direct evaporation cooler................................................................................. 46
6.7.3. Reversal of direct evaporation coolers................................................................................................... 46
6.7.4. Inverter direct evaporation cooler control............................................................................................ 46
6.7.5. Additional zone control................................................................................................................................ 46
6.7.6. Pressure auto balance ....................................................................................................................................47
6.8. Troubleshooting...........................................................................................................................................................47

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 5
1. VERSO AIR HANDLING UNITS
UAB KOMFOVENT thanks you for choosing VERSO air hadling unit. Because a lot of attention is given to-
wards unit quality we will be thankful for your help expressing your comments and responses, or suggestions
regarding technical and running qualities of the unit.
To avoid misunderstandings, before installing the unit, carefully read this instruction. Keep the
instruction, warranty and technical information data – you may need them during exploitation.
Inspect the air handling unit carefully to make sure it was not damaged during transpor-
tation.
More detailed information about the parameters of the VERSO air handling units can
be found in the AHU’s printout (technical specications).
Do not switch on an ungrounded air handling unit.
Before switching on the unit, all doors must be closed and locked; the safety covers
should be bolted.
Before switching on the unit, its compartments have to be xed fast among them.
There is pressure inside the air handling units; this is why it is forbidden to open any
doors before switching o the unit.
Before performing any inspection work inside the unit, be sure the unit‘s electric power
supply is disconnected and there are no rotating parts.
Before opening the doors, switch o the unit and it‘s main switch and wait for 1–2min-
utes till the fans will stop rotating.
Before switching on the air handling unit, activate all the safety functions.
The air handling unit can be switched on or o only by the means specied in the con-
trol system.
Be careful when doing water air heater assemblage works – heat exchanger can get as
hot as 130 °C!
If the air handling unit does not have the manufacturer’s control system, then the com-
pany that installed automation is responsible for the unit’s functioning and safety reli-
ability.
Risk areas with rotating parts. Moving parts are the fan impeller, drive pulleys of
the rotary heat exchanger, if tted, and by-pass/shut-o damper of the plate heat ex-
changer, if tted. The lockable inspection doors serve as protection from contact with
the fans and the heat exchanger. If the fan outlets aren’t connected to any duct, they
must be tted with a protective screen (wire mesh).
After initial unit start-up, also every time after replacing of the lters, it’s necessary to
perform clean lters calibration procedure (see 6.5.1.5 Chapter).
Drilling and using self-tapping screws on the unit casing is prohibited (where it is not pro-
vided by the construction), since cables or tubes inside of the casing may be damaged.

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
6
EN
Air damper Fan
Air lter Air cooler
Rotary heat exchanger Compressor
Plate heat exchanger Noise attenuator
Water air heater
Electrical air heater
Inspection
VERSO Air Handling Units marking: informative
VERSO Air Handling Units marking: warning
Note!
Important information in
the instruction manual.
Caution!
Rotating parts!
Place for siphon.
Note!
Before performing any
inspection work inside
the unit, be sure the
unit‘s electric power
supply is disconnected.
1.1. VERSO Air Handling Units marking

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 7
1.2. VERSO-S – Air Supply Units
1. Air damper (closing)
2. Supply air lters
3. Fan with electric motor
4. Air heater (water or electric)
5. Air cooler (water or direct evaporation)
6. Frequency inverter
1 2 11 6 11 9 9 3
1515
15
12
4
16 78
10
11
13
14
12 13
14
1.3. VERSO-P/PCF – Air Handling Units Equipped with Plate Heat Exchanger
7. Base frame
8. Sections connection
9. Sealing gasket
10. Connection bolt
11. Extension module
12. Main module
1. Air dampers (closing)
2. Supply air lters
3. Exhaust air lters
4. Supply air fan with electric motor
5. Exhaust air fan with electirc motor
6. Plate heat exchanger
7. Air heater (water or electric)
8. Air cooler (water or direct evaporation)
9. Main module
10. Base frame
11. Sections connection
12. Sections connection
13. Sealing gasket
14. Connection bolt
15. Frequency inverter
16. Extension module
9
8
10
7
7
6
3
12
8
21
11
4
5

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
8
EN
1.4. VERSO-R/RHP – Air Handling Units Equipped with Rotary Heat Exchanger
1
11 6 11 93
8
15 10 12 15
16 47
2
5
1. Air dampers (closing)
2. Supply air lters
3. Exhaust air lters
4. Supply air fan with electric motor
5. Exhaust air fan with electirc motor
6. Rotary heat exchanger
7. Air heater (water or electric)
8. Air cooler (water or direct evaporation)
9. Main module
10. Base frame
11. Sections connection
12. Sections connection
13. Sealing gasket
14. Connection bolt
15. Frequency inverter
16. Extension module
1.5. Brief Description of the Unit
• Casings of air handling units are made of galvanized steel sheets, which are powder painted. Mineral
wool is used for thermal insulation and sound attenuation. Unit cover panels are 45 mm thick.
• The air handling units are intended for ventilation of medium-sized and big-sized spaces (eg. shops,
oces, etc.), having operating ambient temperature and relative humidity. As standard, the unit
is designed for indoor and outdoor (with additional parts) placement. The operating temperature
range for the unit is -30 °C ... 40 °C, outdoor air temperature.
• The air handling unit is not to be used to transport solid particles, even not in areas where there is a
risk of explosive gases.
• VERSO-R is equipped with a rotary heat exchanger, VERSO-RHP air handling units with a rotary heat
exchanger and a heat pump system, VERSO-P/PCF – with plate heat exchanger, air lters, an electric
or water heater, fans and automation control system, to ensure safe and ecient operation of the
unit.
• Before you open the door, the unit must be switched o and the fans must have been given time to
stop (up to 3 minutes).
• The unit contains heating elements that must not be touched when they are hot.
• To maintain a good indoor climate, comply with regulations and, to avoid condensation damage,
the unit must never be stopped apart from during service/maintenance or in connection with an
accident.
• If the unit is placed in spaces with high humidity, condensation might occur on the surface of the
unit when outdoor temperatures are very low.
• Under conditions, when the outdoor air temperature is low and humidity is high, risk of heat ex-
changer frosting may appear. For this reason anti-frost protection function is foreseen in the control-
ler of the Komfovent air handling units. Depending on the type of the recovery, dierent methods
11
13
14
12 13
14

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 9
of anti-frost protection are available: cold air by-passing, or / and supply air fan speed reducing.
For extremely low outdoor air temperature the duct mounted preheater is recommended. Counter
cross ow heat exchanger is the mostly sensitive for low outside air temperatures, as the risk of
frosting appears in the temperature range from 0 to -5 °C and below. Standard aluminium cross-ow
plate heat exchanger has better features, as the risk of freezing appears only at -10°C. The lowest risk
and the highest resistance to cold outside air is a competitive feature of the rotary heat exchanger,
as it is not freezing even at the temperatures of -30 °C if the humidity level of the air is appropriate.
1.6. VERSO Air Handling Units Composing Options
VERSO-S VERSO-P/PCF VERSO-R/RHP
R1L1R2L2
outdoor intake
supply air
extract indoor
exhaust air
R1
Air handling unit inspection doors on the right; supplied airow into room is on the bottom of the unit.
L1
Air handling unit inspection doors on the left; supplied airow into room is on the bottom of the unit.
R2
Air handling unit inspection doors on the right; supplied airow into room is on the top of the unit.
L2
Air handling unit inspection doors on the left; supplied airow into room is on the top of the unit.

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
10
EN
2. VERSO AIR HANDLING UNITS CONSTRUCTION
2.1. Fans
VERSO air handling units are equipped with radial fans with direct drive.
Motors of the fans with backward curved blades must be con-
trolled by frequency converters. Frequency set by the frequency
inverter cannot exceed frequency data specified in the print out.
Note: fan type is specied in the print out.
Measuring device for determining air volume
The dierential pressure compares the static pressure in front of the
inlet ring with the static pressure in the inlet ring of the narrowest point.
The dierential pressure between the static pressures is related to
the air volume via the energy conservation rate as follows:
10080700381 =×=
×= w pk
where k takes into account the specic ring characteristics.
Example: If dierential pressure of 700 Pa is measured for size 630,
the air ow rate can be calculated: 10080700381 =×=×=
w
pk
(m3/h).
¨32
ØDSa
ØLA
Ø32
–+
Δpw
Cleaning and Inspection of Fans and Fan Space
Polluted fans decrease eciency.
Before performing any inspection work, check whether the unit is
switched o from the electric power supply.
Inspect and clean the fan impellers to remove possible dirt deposits. Check the impeller to make
sure that it is not out of balance. Clean or brush o the fan motor. It can also be cleaned by carefully wip-
ing it with a damp cloth that has been dipped in a solution of water and dishwashing detergent. Clean
the fan space, if needed.

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 11
2.2. Plate Heat Exchanger in VERSO-P/PCF Air Handling Units
When operating the air handling unit equipped with the plate heat exchanger, unit control automa-
tion should have function of protection from frost.
Condensate can accumulate in a plate heat exchanger; therefore it is essential to install siphons on
the condensate drainpipes. Depending on the unit construction, plate heat exchanger section may have
1 or 2 siphones.
For proper operation of CF heat exchanger frost protection, it
should be calibrated. Calibration is performed once and it is recom-
mended to do this during rst start-up of the AHU (for more infor-
mation refer to section”6. Operation manual”). Without calibration,
CF heat exchanger may get frozen and will be damaged during low
outdoor temperatures.
It is important to maintain cleanliness of the plate heat exchanger:
to change lters installed in the air handling unit on time, if the heat
exchanger gets dirty, to perform heat exchanger periodical clean-
ing. The temperature eectiveness of a dirty heat exchanger can
diminish considerably.
1. Plate heat exchanger
2. Support frame
3. Frame
4. Bottom shields
5. Place of sections connection
6. Bypass damper with actuator
7. Drop eliminator (if needed)
8. Condensate bath with drainage
Plate heat exchanger can be easily removed for inspection.
6
5
418 7
2
3

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
12
EN
Removing plate heat exchanger from VERSO-P/PCF air handling units.
Demounting of the section.
9
1 8 74
4
56
23
1. Screws are unscrew; bottom shields are removed
2. Plastic axle-pin
3. Screw
4. Frame bolts are removed; the frame is removed
5. Frame
6. Frame bolts
7. Plate heat exchanger is removed
8. Condensate diversion mechanism is removed
9. Bolts connecting the sections are removed
Cleaning and Inspection of Plate Heat Exchanger
Always clean against the regular direction of airow.
Inspection and dedusting of the plate heat exchanger is performed once per year (it is removed
from the unit and blown with an air blast or washed with tepid water).
Inspect the condensate drain to make sure that it isn’t clogged.

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 13
2.3. Rotary Heat Exchanger in VERSO-R/RHP Air Handling Units
The heat exchanger actuator mechanism is oiled with synthetic solution; therefore there is no need to
oil mechanism during its exploitation.
It is important to make sure that the rotary heat exchanger me-
chanism is clean: to change the lters installed in the air handling
unit on time, to perform periodical heat exchanger cleaning. The
temperature eciency of a dirty heat exchanger can diminish con-
siderably.
Hygroscopic rotors, may transfer unpleasant smells in humid out-
door/room conditions. Silica gel coating of the rotor material, ab-
sorbs humidity together with VOC (Volatile Organic compounds),
emitted by furnishings, building materials, cleaning agents, pol-
luted outside air or in rain water dissolved chemical elements. Smell
strength may dier based on the humidity and VOC concentration
in the air passing through the rotor wheel.
123
5 5
6
447
1. Rotary heat exchanger frame
2. Rotor
3. Shaft
4. Actuator with a reducer
5. Main module
6. Heat pump system
7. Control module of electronic expansion valve and heat pump
Cleaning and Inspection of Rotary Heat Exchanger
Inspection of the rotary heat exchanger is performed once per year. Free rotation of the rotary heat
exchanger, continuity of the rotating belt, absence of damages of the rotor drums and the seal gasket are
checked. It is necessary to check the stretch of belt. Free belt will slide and the eciency of rotary heat
exchanger will fall down. To reach maximal eciency, rotor must turn at least 8 times per minute. Pol-
luted heat exchanger will decrease eciency. Clean heat exchanger with an air blast or wash with tepid
water. Check out water falling on the electric motor.
If the fabric drive belt is worn or substantially fouled, it should be replaced. Do not lubricate it! Con-
tact service personal.
Rotary heat exchanger’s service and maintenance details are de-
scribed in “Rotary heat exchangers” manual.

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
14
EN
2.4. Verso RHP units
Verso RHP information
Carefully, high pressure inside (up to 42 bar).
Inside the unit is refrigerant R410A, friendly to environment.
Before commissioning, make sure that the air handling unit is lled with refriger-
ant. This can be done by looking through the moisture indicator.
The unit washing, cleaning, maintenance is carried out as well as any other type of
device described in this manual.
In heating mode supply air temperature can range due to frozen evaporator.
Therefore, this unit is not recommended for use as a basic unit for heating, at low
outdoor air temperatures use with a secondary heater.
Verso RHP air handling (sizes 10–70) are supplied with two inspection sections (gure bellow). Ex-
haust air inspection section are supplied with drop eliminator, heating cable and pan for extract air coil.
Supply air inspection section are with pan and drop eliminator when design air ow velocity threw sup-
ply air coil are more than 2m/s. If supply air velocity threw supply air coil are lower than 2m/s where are
no pan and drop eliminator.
Verso RHP operation limits
For safe and ecient work units with integrated heat pump, has following limitations:
• Air ow limitation as indicated in table and gure below. If one or both air ows are bellow switch
o limit (table1) heat pump will be switched o and indication icon will occur in control panel (more
detail in page 32);
Table 1
Unit size Air ow when heat pump switched o [m3/h] Air ow when heat pump capacity are limited [m3/h]
10 900 1200
20 1800 2400
30 2700 3600
40 3600 4800
50 5000 7000
60 7000 9000
70 9000 12000
80 10000 14000
90 13000 16000

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 15
Diagram above illustrate heat pump capacity limitation by air ows.
Air ow
Heat pump
capacity, %
0100
20
Limited heat
pump capacity
Heat pump
switched o󰀨
0
Figure 1
• Due to air ow limitations, RHP units with recirculation function (gure 2) working regime could be
unstable. If one of air ow (in recirculation function exhaust on fan side) are lower than in gure 1,
heat pump capacity will be limited or heat pump will be switched o;
D
A
C
B
RCA
Figure 2
D – exhaust air
C – extract indoor
A – outdoor intake
B – supply air
RCA – recirculated air
• Maximum outside temperature for heating is 15°C and minimum outside air temperature for cool-
ing is 20°C. If outside air temperature exceed this limits heat pump will be switched o and indica-
tion icon will occur in control panel (more detail in page 32);
• When exhaust air temperature after rotary heat exchanger are <(-10)°C, heat pump will be switched
o and indication icon will occur in control panel (more detail in page 32);
• Heat pump has pressure switches for safety. High pressure cut out – 42 bar, cut in – 33 bar. Low pres-
sure cut out – 1.7 bar, cut in – 2.7 bar;

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
16
EN
VERSO-RHp unit data
10 20 30 40 50 60 70 80 90
Number of circuits 1 1 1 1 1 2 2 3 3
Compressors quantity per circuit 111111111
Refrigerant quantity in 1st circuit, kg 2,8 3,5 5,6 8,0 10,0 8,0 9,0 9,0 9,5
Refrigerant quantity in 2nd circuit, kg - - - - - 5,9 6,7 7,0 7,5
Refrigerant quantity in 3rd circuit, kg -------7,0 7,5
Informative sticker inside the unit

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 17
2.5. Air Dampers
Closing air dampers with aluminium or galvanized steel blades are used in the units.
Air damper is xed to the air handling unit with screws.
1. Aluminum or galvanized steel blades
2. Rubber sealing
3. Plate shaft for the actuator
4. Shaft for bypass damper closing/opening
5. Fastening bend
6. Screw
1 2 5
5
6
4
3
Installing Electrical Drives on the Air Dampers. Electrical Dampers Safety
The electrical actuators control air dampers of the air handling unit.
If air handling unit is installed outside, then all the drives outside have to be protected from moisture
and dust.
12
0
1
Direction of rotation
1. Electric drive xed to the air handling unit installed in a building
2. Electric drive xed, under the cap, to the air handling unit installed outdoors

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
18
EN
2.6. Air Filters and Filter Change Procedure
Synthetic or berglass bag lters are used.
When operating the air handling unit, the unclean lters should be
changed on time.
Pressure level drop at which it is recommended to change lters, and the measurements are in the
technical data pages.
223
1 1
1. Upper lter holder
2. Lower lter holder
3. Changeable lter
Air filter clogging check
The lters should be changed when the lter alarm has been activated. We recommend to change l-
ters at least twice per year: before and after heating season, or more. Clogged lters unbalance ventilation
system, air handling unit uses more power.
If air handling unit is working in small speed, the lters must be checked on unit maximum speed.
Filters are one time used. We do not recommend cleaning them. Stop the air handling unit before chang-
ing lters.
Before changing air lters, check whether the unit is switched o
from the electric power supply.
2.7. Water Air Heaters, Air Coolers, Direct Evaporation Air Coolers
Mostly used with aluminum plates (2.5; 3 or 4 mm n pitch) and copper pipes.
Upon additional order can be assembled with plugged connection for frost sensor.
1. Water air heater
2. Water air cooler
1 2 3 4
3. Direct evaporation air cooler
4. Two-step direct evaporation air cooler

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01 19
Water Air Heaters, Air Coolers, Direct Evaporation Air Coolers in VERSO-S Units
Possible VERSO-S composition options: with the air heater and air cooler and additional heater
mounted outside the unit.
Water Air Heaters, Air Coolers, Direct Evaporation Air Coolers Mounted at the Bottom
of VERSO-P/PCF, VERSO-R/RHP Units
The section of air heater, air cooler, or direct evaporation air cooler insulated in mineral wool is
mounted on the outside of the unit. Therefore air handling unit takes less space and it is more conveni-
ent to install.
1 2
1. VERSO-R/RHP or VERSO-P/PCF with air heater installed outside the unit
2. VERSO-R/RHP or VERSO-P/PCF with air heater or air cooler installed outside the unit
Water Air Heaters, Air Coolers, Direct Evaporation Air Coolers Mounting Types at the Top of
VERSO-P/PCF, VERSO-R/RHP Units
1 2 3
1. VERSO-R/RHP or VERSO-P/PCF with air heater and air cooler positioned on the welded frame outside the unit (base
frame with legs for heat recovery section - only as additional set)
2. VERSO-R/RHP or VERSO-P/PCF with air heater and air cooler suspended outside the unit (hanging bar – only as ad-
ditional set)
3. VERSO-R/RHP or VERSO-P/PCF with a suspended air heater outside the unit

UAB KOMFOVENT we reserve the right to make changes without prior notice
V-C5.1_21-01
20
EN
Water Air Heater, Air Cooler, Direct Evaporation Air Cooler Connection to VERSO-P/PCF and
VERSO-R/RHP Series Air Handling Units
When connecting heat exchanger to the system, it is necessary to use two pipe wrenches:
Be careful when exploitating hot water air heaters as the heating agent tempera-
ture may reach 130 °C!
When operating air handling unit in the temperatures lower than 0 °C, it is neces-
sary to use glycol additionally or assure the reversible heating agent temperature
more than 25°C.
Pipework package1must include circulation pump, which circulates heating/cool-
ing medium through the coil (smaller circuit) and 3-way mixing valve with modu-
lated actuator. In cases if 2-way valve is used, additionally it must be installed non-
return valves to ensure continuous circulation around smaller circuit. PPU must be
installed as close to the water coil as possible.
It is important to maintain air heaters and coolers cleanliness; that is to change
lters installed in the air handling unit on time. If the air heater or cooler gets dirty,
to perform periodical cleaning.
1
Glycol is used in the air handling units with coil heat exchanger. Never pour glycol down a drain; col-
lect it in a receptacle and leave it at a recycling centre or the like. Glycol is highly dangerous to consume
and can cause fatal poisoning or damage the kidneys. Contact a doctor! Avoid breathing glycol vapour
in conned spaces. If you get glycol in your eyes, fush them thoroughly with water (for about 5 minutes).
1 2
1
33
1. Electric/Water heater, Air cooler or direct evaporation air cooler mounting pin
2. Frame
3. Gasket
1 It is recommended to use PPU made by Komfovent.